Yeah, I know, "I'm a teenager, it's part of growing up" and all that, but honestly I'm sick of it. The pressure is on me to lose weight to both look good, and to be healthy, both of which I don't feel like I'm fulfilling.

I want to cut down to around 205lbs, light enough to improve my tennis game, and yet still enough weight for me to hold my own during football. I've already started with cardio, which is running at least 3 miles a day, even more if I'm bored (I like running ) but I haven't been able to find myself a diet that keeps me full so I don't snack. Can someone please construct me a diet and some guidelines?

The optimal diet IS snacking. A little meal of protein/carbs every 3 hours. Plenty of water in between. Fruits and vegetables are free (except for bananas and other higher calorie foods). If you get hungry, fill up on nuts, not junk. You're young and heavy, you'll lose fat extremely fast if you stick to it. It's better that you do the research and come up with your own diet, though.

Cardio is actually secondary to diet. Personally, I only do cardio for my heart health, because I know that busting my *** on the treadmill is the equivalent of not eating a cookie.

Cardio is also secondary to weight training when talking about weight loss. You play football so I'm sure you do enough of it.

Let me suggest to initially try to cut down on simple carbs. That means fewer processed carbs in the form of sugar, chips, potatoes, bread, and corn. Eat more vegetables and fruit instead of simple carbs and softdrinks.

For some people this makes a huge difference.

It really is going to be best for you to get your body fat lower before you are 20. From my casual unscientific observation, people who are overweight as teenagers tend to suffer from weight problems the rest of their lives. Those who are fit at 18-20 tend to have an easier time. I can think of exceptions, but I think a healthy and varied diet is a habit that you should start building now.

Stop drinking just about everything sold in a 20 ounce bottle at 7/11. If you cut the high fructose corn syrup out of your diet the weight would probably drop off - soda, bottled iced tea, energy drinks, gatorade, vitamin water, and even some juices. Read the labels, and don't drink it or eat it if it has corn syrup in it.

Funny how so many people are against white rice, yet a huge percentage of Asian people can eat it without getting fat. Hmmmmm......

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Pros should stop wasting money on coaches and doctors and just read the experts on this forum.

You can eat some junk in moderation every once in a while, just as long you keep your overall caloric intake relatively low for quite a while. When buying stuff, always look at calories, fat, calories from fat, protein, and avoid stuff that has excess amounts for a given serving. Summer is a great time to lose weight; without school, you can go to the gym more, do more exercise, etc. Drink lots of water, and try drinking some cold water right after you wake up to kick up the metabolism a bit.

I also used to have a weight problem but I guess the difference was that I grew 3inches last spring/summer in addition to all my exercise, so I got a lot leaner.

One tip:
that I've seen done in a professional health class.
Log everything you eat.
Measure all of the calories.
Eat sensibly,
it's common sense to know which foods to stay away from, and pay attention to all of the things you are eating.
Treat yourself once in a while, but don't go overboard.
Go to an online calorie transferer to see how much you are burning when you are exercising (for running and tennis)
and do the math.
it should be fairly easy,
also dried nuts are very good for athletes and are good sources of protein.
EAT FRUIT AND VEGGIES. ;D

I have an easier method. Log everything you eat for a day or two. Then just eat variations of the same thing every day. Sounds dull, but you should be eating the same sorts of things every day - fruits, vegetables, whole grains, all of that isn't going to change. You should be able to get to the point where you have a good estimate of how many calories you have eaten without having to actually count them.

And when you have no choice but to eat at fast food,
make sure you order a chicken sandwich, and just the sandwich, and make them take off the bacon if any, and drink an iced tea, but the brewed kind.
This should help considering the calories of a burger, fries, and a 42 oz. soda.